diff --git a/pkgs/development/python-modules/urllib3/default.nix b/pkgs/development/python-modules/urllib3/default.nix
index 4546207b08c6..d951e436480b 100644
--- a/pkgs/development/python-modules/urllib3/default.nix
+++ b/pkgs/development/python-modules/urllib3/default.nix
@@ -4,11 +4,11 @@
 
 buildPythonPackage rec {
   pname = "urllib3";
-  version = "1.24.2";
+  version = "1.24.3";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "9a247273df709c4fedb38c711e44292304f73f39ab01beda9f6b9fc375669ac3";
+    sha256 = "2393a695cd12afedd0dcb26fe5d50d0cf248e5a66f75dbd89a3d4eb333a61af4";
   };
 
   NOSE_EXCLUDE = stdenv.lib.concatStringsSep "," [